Year	current US$
1970	7880000.010132788
1971	8370000.153779979
1972	10380000.084638588
1973	18089999.459683914
1974	10419999.841600664
1975	12720000.04351139
1976	9650000.119581806
1977	24619999.86693262
1978	47179999.90284443
1979	65080000.60543414
1980	64880000.10699037
1981	68559999.55534938
1982	50429999.677464336
1983	42359999.954700455
1984	61009999.72224234
1985	53329999.75979326
1986	72910000.6818771
1987	81359999.9342114
1988	84750000.66682693
1989	96960000.96201897
1990	159960003.01092857
1991	167899995.75167888
1992	165180002.3019315
1993	125869999.09207217
1994	168190001.43744063
1995	158059998.5290319
1996	204050000.02682215
1997	296810001.01566315
1998	246140001.25601897
1999	272130001.604557
2000	237039998.47173703
2001	216620000.3810228
2002	230999998.5378235
2003	241919998.73518932
2004	282150002.2411348
2005	115230001.33037569
2006	182659999.96662128
2007	303119998.9914894
2008	369730004.4298173
2009	372510002.85148627
2010	370199996.0243702
2011	402019998.64354724
2012	360989997.92337424
2013	400890002.6381016
2014	304780002.11715686
2015	269229997.2139299
2016	277000001.5050172
2017	349519998.9080431
2018	365759999.0367884
2019	317820000.42498106
2020	478339996.87433213
2021	310100004.5835972
2022	172169999.36103818